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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 1992-06-22 to 1992-06-22
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
Directive 84/449, vapour pressure balance
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: vapour pressure balance
Key result
Temp.:
20 °C
Vapour pressure:
< 0 hPa
Temp.:
25 °C
Vapour pressure:
< 0 hPa
Temp.:
50 °C
Vapour pressure:
0 hPa

- Reference substance (Bis(2 -ethylhexyl)-phthalat) was used.

- Formula used for the calculation:

Tm = -25 °C

Antoine equation: p = 10 exp(A - B / (T+C))

- Interpolation range: Tm < T < 125.6 °C

A = -1.7476

B = 93.9615

C = -16.8200

R = 0.99668

Explanation:

p = vapour pressure in hPa

T = temperature in °C

Tm = melting point in °C

R = correlation coefficient

Conclusions:
Using the vapour pressure balance method the vapour pressure of the test item was determined to be <1E-5 hPa at 20 °C, <1E-5 hPa at 25 °C and 2.63E-5 hPa at 50 °C.
Executive summary:

Using the vapour pressure balance method the vapour pressure of the test item was assessed in accordance with EU method A.4. Using the Antoine equation and regression analysis the vapour pressure was determined to be <1E-5 hPa at 20 °C, <1E-5 hPa at 25 °C and 2.63E-5 hPa at 50 °C.

Description of key information

Using the vapour pressure balance method the vapour pressure of the test item was determined to be <1E-5 hPa at 20 °C, <1E-5 hPa at 25 °C and 2.63E-5 hPa at 50 °C.

Key value for chemical safety assessment

Vapour pressure:
0 hPa
at the temperature of:
20 °C

Additional information

Using the vapour pressure balance method the vapour pressure of the test item was assessed in accordance with EU method A.4. Using the Antoine equation and regression analysis the vapour pressure was determined to be <1E-5 hPa at 20 °C, <1E-5 hPa at 25 °C and 2.63E-5 hPa at 50 °C.

For chemical safety assessment a vapour pressure of 0.00001 hPa at 20 °C was used.

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